1981 – Sony created first consumer digital camera – Sony Mavica
Digital imaging uses an electronic image sensor to record image vs. chemicals on film
Two types of sensors
CCD: charge coupled device
CMOS sensors: complementary metal-oxide semiconductor-type of digital circuitry
pixel- single element, point, dot, that contains color
depending on camera capability, you can capture images with millions of pixels
monitor resolution- number of dots drawn horizontally across the screen, and vertically across the screen
Bit depth- number of bits of information each pixel
GIF- graphics interchange format
-can animate in short loops
-replaced by PNG
PNG- portable networks graphic
-lossless compression
-flexible color-wise than GIF's
small graphics= use PNG
animated graphics= use GIF
Digital Photography Terminology
Focal length
Aperture
ISO
Shutter speed
sRGB
EXIF data/GPS
RAW (.CR2/.NEF)
Powerpoint 10/2/12
Composition: arrangement of elements and their relationship to the background of the image
Find the focal point
Pick one focal point and isolate the subject. Be sure that only things you want the view to see appear in the picture!
Simplify your Background
Try changing your point of view by walking around the focal point to get rid of distracting background
Avoid Unrelated Subjects
Make the reason for taking this picture clear
Avoid Centering Subjects
Generally, pictures with subjects directly in the center tend to be more static and less interesting than pictures with off center subject placement
Rule of Thirds
The human eye is naturally drawn to a point about 2/3 up a page
Imagine our picture area dived into thirds both horizontally and vertically
the intersections of these imaginary lines suggest four options for placing the center of interest for good composition
See slides 9-14 for examples
The Megapixel Myth (Article)
Pixels- Stands for Picture Element. Made up of little dots arranged horizontally and vertically to form a picture.
Image Resolution- Resolutions is how many pixels you have counted horizontally or vertically when used to describe a stored image. Usually fewer pixels vertically since the images aren’t as tall as they are wide.
Print resolution-How many pixels you have per inch or other linear unit when you print on paper.
Screen resolution-Most computer screens today are about 100 DPI, dots per inch. Most computer screens are about 1,024 x 768 pixels. If your screen is 10" wide then divides 1,024 by 10 and you have a 102.4 DPI screen. Bigger screens tend to have more pixels, for instance, my 22" CRT has 1,600 x 1,200 pixels and has a viewing area of 16 x 12."
How Cameras Work
-This light path depends on two major factors: 1) the angle of the light beam's entry into the lens.
2) The structure of the lens
-The magnification power of a lens is described by its focal length
-focal length is the distance between the lens and the real image of an object in the distance.
-telephoto lens is a lens with an especially long focal length
- For close ups use wide-angle lens
-shutter determines how much light gets into the lense of the camera
-two major factors of exposure level: 1) How much light is passing through the lens
2) How long the film is exposed
- To increase or decrease the amount of light passing through the lens you must adjust aperture
(is a hole or an opening through which light travels).
.
Powerpoint 10/2/12
The Megapixel Myth (Article)
How Cameras Work
-This light path depends on two major factors: 1) the angle of the light beam's entry into the lens.
2) The structure of the lens
-The magnification power of a lens is described by its focal length
-focal length is the distance between the lens and the real image of an object in the distance.
-telephoto lens is a lens with an especially long focal length
- For close ups use wide-angle lens
-shutter determines how much light gets into the lense of the camera
-two major factors of exposure level: 1) How much light is passing through the lens
2) How long the film is exposed
- To increase or decrease the amount of light passing through the lens you must adjust aperture
(is a hole or an opening through which light travels).
.
-shutter speed determines length of exposure.